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Development LNG field, Snøhvit

The Snøhvit development comprises three fields – Snøhvit, Albatross and Askeladd. These are located in the Barents Sea, about 140 kilometers north-west of Hammerfest in northern Norway. All primarily contain natural gas with small quantities of condensate. Snøhvit is the first major development on the Norwegian continental shelf without surface installations.

Instead, subsea production facilities stand on the seabed in water depths of 250 to 345 meters. The gas is transported through a 143 kilometers long pipeline to the land-based processing facility for LNG at Melkøya in the north of Norway. Besides the main line, a carbon dioxide injection pipeline, two chemical lines and an umbilical connect the field with Melkøya. The pipeline route is characterized by an uneven seabed the first 20 km from shore and pockmarks and iceberg plough marks at the field. The soil varies from hard clay closest to shore, sand in the mid section and soft clay at the field. The maximum water depth is approximately 345 meters at the field and 445 meters along the pipeline route. Boskalis Offshore was awarded a contract for subsea rock placement, which was required during the pre- and post-installation phases.

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Platform installation,
De Ruyter field

The De Ruyter field, discovered in 1996, straddles Blocks P10a and P11b in the North Sea, which are both operated by Petro-Canada. The development consists of a Gravity Base Structure (GBS) with wellhead and lattice towers supporting an Integrated Production Deck (IPD). De Ruyter joins Hanze as Petro-Canada’s second operated offshore field in the Dutch North Sea. Heerema Zwijndrecht was awarded the fabrication, installation and hook-up of the GBS and IPD. The transportation, installation and stabilisation of the GBS was subcontracted to a consortium between Smit Marine Projects and Boskalis Offshore.

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Bridge construction, Stralsund

SMIT’s 1,200 tonnes sheerlegs Taklift 7 completed a major German bridge building programme during 2006. The sheerlegs had spent several months at the new Stralsund Bridge, on the German Baltic coast. This suspension bridge links the mainland with the island of Rügen.

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Pipeline construction, Mumbai Highfields to Uran Trunkline

The Mumbai High Fields to Uran Trunkline Project is situated near Mumbai (Bombay) in India. ONGC Ltd (Oil & Natural Gas Corporation) has constructed two new pipeline connections from the Mumbai High Fields to Uran over a total length of 204 kilometers. These new pipelines have been constructed in order to replace the existing Bombay High Fields to Uran Trunkline, which had already completed more than 25 years of successful operation and had surpassed its design life. The new pipelines are a 30" oil pipeline and a 28" gas pipeline.

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Construction gas pipeline
Beachfield Upstream
Development

The BUD project entailed the construction of a 66 kilometer, 36" gas pipeline, 63 kilometers offshore and 3 kilometers onshore underground to the treatment facilities. The offshore pipeline runs from the east coast at Beachfield (Rustville), Guayaguayare, to the 'Cassia B' platform complex. At the NGC Abyssinia facilities, 3 kilometers off Beachfield, a new sludge catcher has been developed to separate the liquid or condensate from the natural gas. The condensate is separated from water and metered. The station is also designed to control the pressure of gas, as it enters into the land gas transmission system. NGC's existing 30" and 24" gas pipelines have also been diverted to the new Abyssinia sludge catcher.

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Seabed preparations, Changi Outfall

The Public Utilities Board implemented the Deep Tunnel Sewerage System as a long-term solution to meet the needs for sewerage water collection, treatment and disposal to help maintain Singapore’s clean and healthy environment. In phase one of the Deep Tunnel Sewerage System, the Changi Water Reclamation Plant was constructed in the east of Singapore, from which the Changi Outfall was subsequently constructed. Treated effluent from the water treatment plant will flow through outfall pipelines and be discharged through series of diffusers, dispersing the effluent in the seawater. Boskalis International was awarded the contract for the Changi Outfall in 2002 and formed a joint venture with Archirodon to construct the project.

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Heavy lift operations, Rion Antirion bridge

The Rion Antirion bridge, a 2.3 km long cable stayed bridge, consisting of 4 pylons from which the bridge deck is suspended. SMIT was involved in two phases of the project. During the construction of the pylons, SMIT carried out the management for the tow-out and positioning. For the installation of the steel components SMIT carried out the heavy lift operations.